BirdAnalyst
Species · Illinois · BBS 2025 Release · 1966–2024

Cooper's Hawk Population Trend in Illinois

All statesGeneralists

Cooper's Hawk in Illinois has surged: up 982% on the route-weighted index since 1980.

+982%Since 1980
90Routes In State
40Years

Notable Cooper's Hawk Trends in Illinois

long arc increasecomputed index

Cooper's Hawk has surged in Illinois: up 982% on the route-weighted index since 1980.

Cooper's Hawk Population Forecast in Illinois

If the recent trend holds, Cooper's Hawk in Illinois is projected to stay roughly flat through 2029, near 0.23 (95% range 0.16–0.31). A 5-year backtest shows a typical error of ±27.4%, with 80% of held-out values landing inside the 95% band.

+10%Change by 2029
0.23Projected 2029 index
0.16–0.3195% range
±27.4%Backtest error
19782029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.210.140.29
20260.220.140.29
20270.220.150.30
20280.230.150.30
20290.230.160.31

Cooper's Hawk Survey Routes in Illinois

Routes recording Cooper's Hawk in Illinois.
Wayne420241992
Columbia320222001
Kell320082007
Mill Creek220191998
Janesville220242005
Humboldt220222009
Olney220041992
Troy Grove220222015
Nilwood220122012
York220171993
Dudleyville220152002
Guilford120171978
Holcomb120151998
Cherry Val119981992
Barrington119931990
Itasca120242012
Geneseo120171988
Putnam120241998
Sheffield120191995
Buda120232023
Streator120222016
Essex120242014
Newark120152011
Sherburnvill120132011
New Lenox120161993

Cooper's Hawk Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.